Investment in Receivable Portfolios, Net - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Receivables [Abstract]
Changes in expected future period recoveries	$ (220,829)	$ 0	$ 0
Changes in expected current period recoveries	$ 228,075	$ 0	$ 0